Home / 15,218.50-21,001.62-8,504.40

Finding the Fourth Proportional to 15,218.50, 21,001.62 and 8,504.40

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Solution

The fourth proportional to 15,218.50, 21,001.62 and 8,504.40 is: 11,736.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,218.50 : 21,001.62 = 8,504.40 : x
  2. Step 2: Convert to fraction form
    15,218.50/21,001.62 = 8,504.40/x
  3. Step 3: Cross multiply
    15,218.50x = 21,001.62 × 8,504.40
  4. Step 4: Simplify right side
    15,218.50x = 178,606,177.13
  5. Step 5: Solve for x
    x = 178,606,177.13/15,218.50
  6. Step 6: Final answer
    x = 11,736.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.